Steam and air engine



A. WATERHOUSE 85 B. B. BREWER.

Steam and Air Engine.

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TTnn STATES PATENT ADDISON G. IVATERHOUSE AND BENJAMIN B. BRE\VER, ()FSACRAMENTO,

' CALIFORNIA.

STEAM AND AIR ENGINE.

SPECIFICATION forming part of Letters Patent No. 232,158, datedSeptember 14, 1880,

Application filed October 8, 1879.

To all whom it may concern Be it known that we, ADDISON Gr. VVATER-HOUSE and BENJAMIN B. BREWER, both of the city of Sacramento, State ofCalifornia,

have invented a new and useful Improvement in Steam and Air Engines, ofwhich the following is a specification.

The invention primarily relates to singleactingen gines, or thatclass ofengines in which steam is admitted only on one side of the piston; andit consists in the general construction of the engine in combinationwith the form of constructing the valve and the method of connectin gthe same to the engine, together with 1 the manner of working the valve.

In the accompanying drawings, Figure 1 shows a sectional elevation of anengine and valve embodying our invention. Fig. 2 is a side elevation ofthe same. Fig. 3 is a rear elevation. Fig. 4 is a detail of the valveand chamber.

Fig. 1 shows a sectional elevation of the engine and valve, in which mis the crank; a, the connecting'rod; S, the piston, made long and 2 5cup-like, so as to present a large surface for wear and to guide it inthe cylinder 0. The lower part of the piston is provided with annulargrooves for packing, and the rod a is hung to the piston by the pin i.The valve 0 H is provided with two portsthe steam-port O and theexhaust-port b--the steam entering into the valve-chamber through thepipe d. The valve '0 is of the form known as rolling valve. The steamenters and presses on the 3 5 top of the valve, and by its oscillationthe steam is alternately let in the cylinder 0 and out through theexhaust-port I). The working of the valve will be described hereinafter.

Fig. 2 is a side elevation of the engine, show 40 ing the crank m, roda, cylinder 0, and valve H, also the eccentric E, which works thepumprod f, the pump P being used as a feed-pump for the boiler. In thiscase we attach to the rod 1" a sleeve, h, which moves with the rod,

5 and connected to said sleeve h is the valverod 70, which connects tothe arm 0, and gives the oscillating movement to the valve. In thevalve-chamber H the rod i" is connected to the eccentric E at a point,0, close to said eccentric, and the rod is guided by the bearing 9,

which allows its longitudinal motion and prevents any side play.

The advantage of having the connection 0 close to the eccentric E isshown by reference to Fig.3, which is arear elevationofthe engine,showing the pump P, pump-rod f, guide-bearing g, connection 0, andeccentric E, which causes an even reciprocation to the rod fthat is,while the eccentric is turning its upper center it causes the rod f tomove com-'60 paratively slowly, and while the eccentric is turning onits lower center or close to the bearin g y, it passes the centerquickly, causing a comparatively quick motion on the rod 011 passing itslower center. This inequality to 65. the motion of the rod and eccentricwe use to ad vantage, as follows: by eonnectin g the valverod 7:, whichoscillates the arm 0 and valve within the chamber H, to the pump-rodfath by a collar or hearing; or, if desired, the rod is can be connecteddirectly to the eccentric E. In either case the uneven motion of E willbe imparted to the arm 0 and valve, so at the quick end of the strokethe steam-port will be opened and closed quickly, so as to shut off thesteam while the engine is making but a small part of its stroke, thususingthe steam expansively, while at the slow end of the stroke theexhaust is opened and moves slowly in order to give plenty of time forthe exhaust- 8o steam to escape.

By reference to Fig. 1 it will be seen that the valve-chamber H is madeseparate, and is screwed into the cylinder O by having the outer part ofthe steam-port G threaded and 8 5 tightly screwed into C, as shown; or,if desired, the chamber H can be flan ged an dbolted to theengine-cylinder.

By reference to Fig. 4 will be seen a sectional view of thevalve-chamber H, valve o, rocking arm a, steam-pipe (1, steam-port G,and exhaust-port b. The valve 12 has steampressure on top of it thatenters through the pipe cl, and the valve is worked by the oscillationof the flattened arm a, so that as the valve is at one end of thestroke,.as shown in cross-lines, the exhaust-steam is free to pass outfrom port 0, and down through the ex haust-port I), and while the valveis at the other end of the stroke, as shown in dotted roe lines, thesteam passes through the chamber H and the port 0 into the cylinder 0,as shown in Fig. 1, while at the same time the exhaust-port bis closed.The arm n, that works the valve, is made flat where the valve is fixedto it, and made round where it extends out of the chamber H and isconnected to the arm or lever 0.

What we claim as our invention is 1. The separatelyconstrueted twoported valve H, provided with exhaust-pipe b, steampipe (1, and boss 0,by which the valve is screwed to or connected to the engine, and throughwhich passes the steam communication between the valve and the engine,in combination with a single-acting engine, all construetedsubstantially as and for the purposes Set forth.

2. The combination of the eccentric E, short connection 0, guide-bearingg, pump-rod f and pump P with the rod 7c, arm 0, separate valvechamberH. and sin g'le-acti ng engine 0, all arranged substantially as and forthe purposes set forth.

ADDISON G. WATERHOUSE. BENJAMIN B. BREWER.

Witnesses: 7

BARTON B. WARD, ELIsoN V. BUCKLEY.

